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Best test APIs

MockHero API

Generate realistic, schema-aware synthetic test data for any database schema. 50+ field types, AI prompt-to-schema, pre-built templates, JSON/SQL/CSV output.

Tools & Utilities Free 7-Day Trial

100% uptime 186ms avg MCP ready

Face Liveness Check API

Check if the selfie your users take is indeed live, optimally clicked to save in your records, if there are multiple faces detected in the image, and what percentage of the image the face actually covers.

Visual Recognition & Imaging Free 7-Day Trial

100% uptime 353ms avg MCP ready

Fast Email Validation API

Validates email addresses by checking format, domain, and MX records, providing structured results and metadata for automatic integrations.

Communication & Messaging Free 7-Day Trial

100% uptime 571ms avg MCP ready

Test User Creation API

"Elevate applications and simulations with a versatile, randomized user profile generator for authentic testing and development."

Tools & Utilities Free 7-Day Trial

100% uptime 251ms avg MCP ready

Email Trust Validator API

A secure email validation API that checks format, domain configurations, and email risks, delivering actionable insights and reliability scores.

Security & Cybersecurity Free 7-Day Trial

100% uptime 69ms avg MCP ready

Mock Data API MockHero

MockHero’s Mock Data API simplifies creating placeholder data, perfect for testing and development needs.

Tools & Utilities Free 7-Day Trial

100% uptime 142ms avg MCP ready

Synthetic Data MockHero API

The Synthetic Data Synthetic Data MockHero API allows developers to generate diverse datasets while preserving privacy and compliance.

AI & Machine Learning Free 7-Day Trial

100% uptime 113ms avg MCP ready

Schema Aware Data Generation MockHero API

Enhance your data generation with MockHero's Schema Aware Data Generation API, ensuring data integrity and relevance.

Data & Analytics Free 7-Day Trial

100% uptime 93ms avg MCP ready

Phone Validation API

Phone Validation API validates phone numbers and provides phone metadata, including carrier, line type, prepaid status, and a phone activity score to identify disconnected numbers.

Communication & Messaging Free 7-Day Trial

100% uptime 435ms avg MCP ready

Quick Email Verification API

Ensure high-quality leads with the Quick Email Verification API, your fast, reliable solution.

Communication & Messaging Free 7-Day Trial

100% uptime 84ms avg MCP ready

Trusted Email Checker API

Validate and verify email addresses securely to enhance user trust and reduce fraud with our Trusted Email Checker API.

Security & Cybersecurity Free 7-Day Trial

100% uptime 63ms avg MCP ready

Retrieve Web Data Speed Test API

Quickly assess the efficiency of your site using the Retrieve Web Data Speed Test API for optimal performance insights.

Tools & Utilities Free 7-Day Trial

100% uptime 527ms avg MCP ready

Database Seeding MockHero API

Use the Database Seeding Database Seeding MockHero API to populate your databases with quality test data, streamlining your development workflow.

Tools & Utilities Free 7-Day Trial

100% uptime 898ms avg MCP ready

Transient Mail Verification API

The Transient Mail Verification API validates email addresses, identifying temporary or disposable ones to prevent spam and fraud.

Security & Cybersecurity Free 7-Day Trial

100% uptime 1,357ms avg MCP ready

Instant Email Validator API

Get real-time results with our Instant Email Validator API, ensuring reliable communication every time.

Communication & Messaging Free 7-Day Trial

100% uptime 841ms avg MCP ready

Test Data Generator MockHero API

Generate realistic test data effortlessly with MockHero's Test Data Generator API, enhancing your development process.

Tools & Utilities Free 7-Day Trial

100% uptime 1,451ms avg MCP ready

Dynamic Test Data MockHero API

Effortlessly generate dynamic test data on demand using MockHero's Dynamic Test Data API, optimizing your testing process.

Tools & Utilities Free 7-Day Trial

100% uptime 1,531ms avg MCP ready

Localization QA API

Checks translated JSON, localization strings, placeholders, ICU messages, missing keys, extra keys, empty values, untranslated values, and multi-locale consistency.

Natural Language Processing (NLP) Free 7-Day Trial